I upgraded from ubuntu 12.04 to ubuntu 12.10. After this it is not updating . THe software updater gives the following error :

W:Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-updates/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-backports/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-security/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-proposed/Release.gpg Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal/restricted/source/Sources Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal/main/source/Sources Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal/multiverse/source/Sources Unable to connect to 10.4.42.15:8080:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal/universe/source/Sources Unable to connect to 10.4.42.15:8080:
:
W:Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/quantal-proposed/universe/i18n/Translation-en Unable to connect to 10.4.42.15:8080:
E:Some index files failed to download. They have been ignored, or old ones used instead.

Along with this I am not able to install any thing from software center, it just asks to use this source and after that it just keeps on querying software sources and nothing happens after that

The contents of /etc/apt/sources.list are:

#deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release i386 (20120423)]/ precise main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ quantal main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ quantal restricted main multiverse universe #Added by software-properties
## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ quantal-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ quantal-updates restricted main multiverse universe #Added by software-properties
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ quantal universe
deb http://us.archive.ubuntu.com/ubuntu/ quantal-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ quantal multiverse
deb http://us.archive.ubuntu.com/ubuntu/ quantal-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ quantal-backports main restricted universe multiverse #Added by software-properties
deb http://us.archive.ubuntu.com/ubuntu/ quantal-security main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ quantal-security restricted main multiverse universe #Added by software-properties
deb http://us.archive.ubuntu.com/ubuntu/ quantal-security universe
deb http://us.archive.ubuntu.com/ubuntu/ quantal-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu quantal main
deb-src http://extras.ubuntu.com/ubuntu quantal main
# deb http://download.learnfree.eu/repository/skss / #SKSS
# deb-src http://download.learnfree.eu/repository/skss / #SKSS
deb http://us.archive.ubuntu.com/ubuntu/ quantal-proposed restricted main multiverse universe
deb-src http://us.archive.ubuntu.com/ubuntu/ quantal-proposed restricted main multiverse universe #Added by software-properties

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This describes a problem that can't be reproduced that seemingly went away on its own or was only relevant to a very specific period of time. It's off-topic as it's unlikely to help future readers." – Eric Carvalho, Richard, Luis Alvarado

7 Answers
7

I've had this problem myself with Ubuntu 12.10. Be careful what you do to try to fix this - I ended up re-installing 12.04 to fix my machine. With that said, there is a bug report on Launchpad (sory, can't find it) that explains how Ubuntu 12.10 enables a DNS feature dnsdmasq by default, which messes up a lot of systems. This article explains how to disable dnsdmaq. http://www.ubuntugeek.com/how-to-disable-dnsmasq-in-ubuntu-12-04precise.html

Sounds like an internet issue. (Unable to connect to X.X.X.X:XXXX:) Try disabling your Firewall, and getting out from behind any proxies you may be using. If that doesn't fix it, I'd recommend changing your DNS. Your ISP may be giving you a lame DNS server (or maybe you manually set up a lame one. ;)

Anyway, to do this, just set your DNS servers to 208.67.222.222, 208.67.220.220 (that's OpenDNS; there are others. Pick one that you like, but, most importantly, pick one that works.) If you don't know how to do this, detailed instructions can be found here.